Respuesta :

Answer:

D) ab

Step-by-step explanation:

1/a + 1/b

To  find the common denominator, we have to multiply denominators.

Here the denominators are "a" and "b"

Multiplying them, we get

ab.

The common denominator is ab.

Answer: D) ab

Hope this will helpful.

Thank you.
The best way to add two fractions with two different variables in the denominator is to use both variables multiplied together as the common denominator. Then multiply each numerator with the variable that, that fraction is missing specifically. In other words, I believe it is:

[tex]ab[/tex]

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